ci: mise cleanup (#242)

- Renovate does not find the "github:*" dependencies in `mise.toml`
- The `mdbooks` tools was still installed manually with our own action,
  this is removed and mise is used instead.

.github/actions/setup-mdbook/action.yaml

@@ -1,16 +0,0 @@
-name: "Setup mdbook"
-inputs:
-  version:
-    description: "mdbook version"
-
-runs:
-  using: composite
-  steps:
-    - name: Setup mdbook
-      shell: bash
-      env:
-        url: https://github.com/rust-lang/mdbook/releases/download/${{ inputs.version }}/mdbook-${{ inputs.version }}-x86_64-unknown-linux-gnu.tar.gz
-      run: |
-        mkdir mdbook
-        curl -sSL "$url" | tar -xz --directory=./mdbook
-        echo `pwd`/mdbook >> $GITHUB_PATH

.github/workflows/docs.yaml

@@ -17,10 +17,6 @@ jobs:
         with:
           lfs: "true"
 
-      - uses: ./.github/actions/setup-mdbook
-        with:
-          version: v0.4.52 # renovate: datasource=github-releases depName=rust-lang/mdbook
-
       - name: Build Book
         working-directory: docs
         run: mdbook build

mise.toml

@@ -2,8 +2,8 @@
 go = "1.25.0"
 golangci-lint = "v2.4.0"
 goreleaser = "v2.9.0"
-"github:rust-lang/mdBook" = "v0.4.52"
-"github:ko-build/ko" = "v0.18.0"
+"github:rust-lang/mdBook" = "v0.4.52" # renovate: datasource=github-releases depName=rust-lang/mdbook
+"github:ko-build/ko" = "v0.18.0" # renovate: datasource=github-releases depName=ko-build/ko
 
 [settings]
 # Experimental features are needed for the Go backend